Sheet-metal fireplace



July 29, 1930. H. H. WALTERS SHEET METAL FIREPLACE Filed May 21, 1928 2Sheets-Sheet l v ATTUF?" EYE W/ TN 5525 July 29, 1930. H. H: WALTERS1,771,663

SHEET METAL FIREPLACE Filed May 21, 1928 2 Sheets-Sheet 2 I E i g m 4 0;IL W U l w $1- v VEN 7-0 R ,V Km

7 7- c7 R/v Ers Patented July 29, 1930 UNITED STATES PATENT OFFICEHERBERT H. WALTERS, OF SYRACUSE, NEW YORK, ASSIGNOR TO CHEMICAL TOILETCORPORATION, OF SYRACUSE, NEW YORK, .A CORPORATION OF NEW YORK ISHEET-METAL FIREPLAGE Application filed May 21, 1928. Serial No.279,392.

This invention relates to an all-metal opcn fireplace'unit adapted to beinstalled in ex isting chimneys Without material alteration thereof, butis preferably incorporated in said chimneys during the process ofconstruction so that the cost of such installation may be mainly offsetby the saving of expensive labor and materials required in theconstruction of brick or other mason work fireplaces. The main object isto provide an all-metal fireplace unit having, a combustion chamber ofrelatively large capacity and a suitable smoke hood communicatingtherewith together with a main air heating chamber and supplementalair-heating and circulating chambers provided with cold air inletsleading to the main heating chamber and warm air outlets leading fromsaid chamber ar ranged in such manner that the cold air inlets mayreceive cold air from the outside oi the building, from the cellar orfrom the room in which the fireplace is installed while the warm airoutlets may be connected to suitable grilles in the face of the chimneyadjacent the fireplace or at any other level.

Another object is to provide the supplemental air circulating chamberswith baflie plates between the cold air inlets and warm air outlets fordeflecting the cold air from the lower portions of the supplementalchambers to the main heating chamber from which the warm air isdelivered through the outlets and into the room to be heated.

A further object is to extend the air chainhers entirely across theopposite ends and rear of the combustion chamber and to con struct thewalls of the combustion chamber in such manner as to afford a maximumheat transfer area between the combustion chamber and air chambers andthereby to obtain a more rapid transfer of the heat to the ci culatingair than has heretofore been practiced.

A further object is to construct the hollow side walls of the combustionchamber that they may diverge forwardly at such as will radiate the heatfrom the wall oi "l1" combustion chamber into the room an same time tomake the lower end of hood substantially rectangular and the same widthas the back plate of the shell so that the opposite sides of the hoodmay fall Within the outer walls of he supplemental an chambers to permitthe formation of warm air exits leading from the supplemental vchambersat the outside of the base of the hood. 7

A further object is to extend the front plate of the shell upwardly andforwardly in an inchned plane to approximately the base of the hood butsome distance to the rear thereof so as to form a smoke outlet leadingfrom the combustion chamber into the hood.

A. turther object is to provide the main heating chamber with a topplate or closure extending the entire distance between the outer sideplates and united to the upper edge of the front plate of the shell orback wall of the combustion chamber to form a gas-tight j0lni) therewithand also to receive and support a suitable damper which is movable toand from a position across the smoke outlet to control the escape of theproducts of combustion.

Other objects and uses relating to specific parts of the device will bebrought out in the following description.

In the drawings Figure l is a face view of a portion of a fireplaceconstruction with myimproved allmetal fireplace shell therein.

Figure 2 is a vertical sectional view taken in the plane or" line 2-2,Figure 1.

Figure 3 is a horizontal sectional view taken in the plane of line 3-3,Figure 2, except that one of the cold air inlets is shown 11'] section.i

Figure st is a horizontal sectional View taken in the plane of line 4-4,Figure 2.

Figure 5 is a perspective View of the detached all-metal fireplace unit.

Figure 6 is a side elevation, partly in secg boiler iron or otherrelatively heavy sheet metal and. comprises a lower or main heating Jsection -1-- and an upper smoke hood sec- =1 tron -lpermanentlyassembled end to end one upon the other to form a unitary structure. j

The main heating section 1-- com rises, in this instance, an uprightsubstantial y fiat back late 2, a top plate --3 extending orwardlyfromthe back plate 2 some distance above the lower edge thereof and a frontplate '4 inclined upwardly and forwardly from the lower edge of the backplate to the front edge of the top plate 3- thereby forming a mainheating chamber 5 of substantially triangular cross section from frontto rear with its larger or wider portion adjacent the top 3.

The rear edge of the top plate 3 and lower edge of the front plate -4are welded or otherwise permanently secured to the back plate 2- to formgas-tight joints therewith while the intersecting portions of the topplate -3- and front plate -4- are similarl welded for the same purpose.

Suita 1e upright side plates 6- are permanently united at their rearedges to the opposite upright edges of the back plate 2- to extendforwardly therefrom in divtlerging planes equal distances from the backate. p Additional upright side walls -7- are integrally united at theirrear edges to the opposite upright edges of the front plate -4-- toextend forwardly equal distances therefrom in diverging planes and inspaced relation to the side plates -6- so as to form interveningsupplemental heating chambers 8- which communicate with the main chamber-5.

The front edges of the side plates 5 and 7 terminate in a vertical planesubstantially parallel with the plate -2 and are united to each other byrelatively narrow connecting plates 9 forming the front walls of thesupplemental chambers -8.

The opposite side plates -6- and 7- be extend forwardly some distance be0nd thefront edge of the top plate 3 to orm hollow side walls of acombustion, chamber 10- while the rear and front plates -2- and 4 formthe hollow rear wall of the combustion chamber.

The front edges of the inner plates 7 are disposed in approximately thesame vertical planes as the opposite upright edges of the back plate-2-at right angles thereto while the bottom of the hood -1 is rectan ularand of approximately the width of the ack plate 2 and extends forwardlyfrom the back plate to the front edges of the inner plates 7 andtherefore somewhat beyond the front edge of the top plate 3- to form anintervening smoke passage 11-, as shown in Figure 2.

It further follows that the lower edgespf the opposite side wallswas 6of the Hood extend diagonally across the upper ends of of the upperedges of the inner plate 7- plate -3 to form gas-v in front of the totight joints with tliose parts and also to form warm air outlet openings--12- between the upper ends of the front plates and front edge of theadjacent portions of the top plate 3, as shown in Figure 5, said exit 0enings being disposed at the outer sides 0 the base of the hood 1' andare -therefore, cut off from communication with bustion chamber. a

The back wall of the hood -1 is united to the back wall -2 of the heatersection to form a continuation thereof in the same plane although itsopposite side edges taper 'hood tapers upwardly from its lower edgetoward the back wall 2, as shown more clearly in Figures 5 and 6.

The lower portion of the front wall -4 of the hood -1- forms the frontwall of the smoke exit 11- which is controlled by a damper 13 having itslower edge resting in a grooved seat 14- on the front edge of the topplate -3- and its upper edge movable toward and from the front wall 4 ofthe hood to control the esca of the products of combustion and dra tthrough the passage'1l.

The damper -13 extends from side to side of and between the side wallsof the hood -1 and in all positions of adjustment inclines upwardly atan angle to and above the top plate -3 so that when opened or closed itwill prevent down-draft through the passage 11- into the combustionchamopening and closing the damper and for this purpose it is providedwith a crank arm 15- rigid thereon and extending into the upper portionof the combustion chamber where it is readily adjustable for operationeither by hand or some suitable implement and is held in its adjustedposition by the detent 16 hinged at -17 to the front wall of the heatingsection, as shown in Figure 2.

The lower ends of the outer upright side plates 6 of the heater-section-1 are provided near their front edges with lateral cold air inletopenings 18 to which may be connected any suitable construction of coldthe com- Any suitable means may be provided for In a similar manner thewarm air outlets -1 2 may be connected to suitable conduits -2lleadingto exterior grille plates -22- for directing the heated air to theinterior of the room in which the fireplace is located or to any otherroom desired.

The entire sheet metal fireplace unit including the conduits -19 and20-- may be inclosed in the chimney, as -A-, or other masonry forprotective or ornamental urposes, except that the front of the comustion chamber is left open as usual in ordinary fireplaces.

The grille plates -20-- and 22- for the cold air inlet conduits 19 andwarm air outlet conduits -21-.--'are shown as incorporated in the frontface brick or tiling of the chimney closely adjacent their respectiveopenings 18 and 12, but obviously the conduits l9- and --21 may beextended to the eizterior of other portions of the chimney withoutdeparting from the spirit of this invention.

It will be observed upon reference to Figure 2 that the upper truncatedend of the hood l' communicates directly with the smoke flue as --aofthe chimney in a plane directly over the top plate -3- of the mainheating section of the sheet metal fireplace so that the products ofcombustion in the combustion chamber --10- impinging against the frontplate 4-.and inner side plates 7- are deflected forwardly and upwardlythrough the outlet 11 and thence rearwardly and upwardly along the frontwall of the hood into the smoke flue -a, the amount of draft and smokeoutlet being controlled by the position of the damper -l3-.

Under these conditions the greater portions of the area of the frontwall 4 and side wall --7 are directly exposed to the heat in thecombustion chamber 10- and this heat is instantly transferred to the airchambers 5--and -8-, the heated air then escaping throu h the outlets12, conduits 21- and gri les -22 into the room to be heated while thecold air continues to flow v in at the lower ends of the chambers -8.

In order to increase the efiiciency of the fireplace suitable baflleplates -23- are placed in the lower portions of the chambers -8-- inplanes just above the cold air inlet :openings -18- to extend from frontto rear and from side to side of said chambers so that the cold airentering the inlets 18-- will be deflected rearwardly into the lowerportion of the main heating chamber --5 where the heat is most intenseafter which the heated air is expanded laterally into the chambers -8-and thence forwardly and upwardly across the highly heated plates thenceoutwardly through the front of the combustion chamber or by reversemovements may be replaced upon the bearing -14 it being understood thatthe detent 16 ma be rocked upwardly out of engagement wit 1 the keeper-15 when the damper is being placed in operative position. or removed.

Otherwise the heater section -1- and hood section 1'-- and also theseveral lat-es forming those sections are permanent y secured to eachother to form gas-tight joints and also to constitute a unitarystructure capable of being easily and quickly installed and faced withbrick or tiling for ornamental purposes without the employment ofparticularly skilled workmen in the construction of masonry fireplaces.

hat I claim is.:,

-A sheet metal fire place comprisin a hol low U-shaped shell having itsopposite sides diverging forwardly from the back and its inner backplate inclined upwardly and forwardly from the lower edge of its outerback plate 1n a plane some distance to the rear of the front edges ofthe sides, a hood mounted on the upper end of the shell to extend fromfront to rear thereof and having its opposite sides extended from theupper rear corners of the shell to the upper inner front corners 7- toescape outwardly through the upper outlet openings -12-- and through theadjacent conduits 19 and grilles -20

